It may cause security to get tightened to prevent these types of incidents, but I doubt that it will improve security culture. Going forward, we would theoretically be protected from a breach of this type in other companies, but proper security is a continually moving target. New methods exploits are discovered all the time. That's what I'm worried about - are they going to be proactive in securely protecting information against future threats, or will they just check a few boxes to continue with business as usual?